Fastest way to add text on canvas dynamically

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I made a simple chart by putting stack panels on a canvas and then filling the stack panels with lables according to the data given.However I am not very happy with the performance.

If I change the stack panels with listboxes, and instead of lables add strings, would it be faster to render the data? The data I need to show is a subset from a large array of lists of strings. When I move the index, I have to clear all the listboxes and fill them with the new data.
Or is there a faster way to do it?

All my strings are of 4 characters. Is it possible to change the orientation to vertical so that each listbox shows something like this

A

A

A

A

B

B

B

B

C

C

C

C

D

D

D

D

etc...
The strings are AAAA, BBBB, CCCC, DDDD.

Posted 24-Mar-11 3:05am

Moonwalker031

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Sergey Alexandrovich Kryukov 25-Mar-11 0:08am

OP commented:

Ok I am still very novice with WPF but I am learning slowly.
I need to display lists of strings on a chart stored in an array. Some lists might contain zero items while others might contain up to 20. I was using visiblox chart at first (since it supports zooming) but it does not support adding strings next to each datapoint.
So I created a zoomed in chart myself and when the user moves a slider, the chart updates with the proper data from the array. The chart consists of a canvas with 60 stackpanels next to each other representing the columns. The chart is working fine but it is taking a while to update when moving the slider making it look jittery.

So what I am asking is if there is a better way to implement it (which there is for sure).

@SAKryukov - thanks for the Vertical text block link.

Sergey Alexandrovich Kryukov 25-Mar-11 0:10am

You're welcome. Please don't post non-answers as Answer.
--SA

2 solutions

Solution 2

Why are you putting stackpanels on a canvas? Are you animating the canvas? If not, it just seems redundant.

Posted 24-Mar-11 8:21am

#realJSOP

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-03-24T07:58:00

For a vertical text, you can use implementation of VerticalTextBlock offered in this post: http://blogs.msdn.com/b/delay/archive/2008/06/19/text-from-a-slightly-different-perspective-verticaltextblock-control-sample-for-silverlight-2.aspx[^].

Now, dynamic adding the the canvas:

C#

TextBlock tb = new VerticalTextBlock();
tb.Text = "some text";
//... whatever properties your need
myCanvas.Children.Add(tb);

—SA